"Quartus" redirects here. For the keystone, see Ascension Keystone Quartus.
For the pet version, see Legio Quartulus.
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Legio Quartus chathead

Legio Quartus is one of the bosses in the Monastery of Ascension. Accessing him requires an Ascension Keystone Quartus and 95 Slayer.

As with all the bosses in the Monastery of Ascension, Legio Quartus attacks primarily with a combination of a basic magic attack and a lightning attack - the latter of which is focused in a 2x2 square (expanding to a 3x3 square and then to a 4x4 square over two game ticks) which deals high, magic-style damage to the player if they stand where the lightning falls. (The lightning attack is always affixed to the player's location, and thus continuously moving throughout the fight is imperative.)

Like all of the Legiones within the Monastery of Ascension, Legio Quartus has a special ability which activates as his life points are gradually depleted in 25% intervals (every 7,500 life points drained) until death - occurring a total of three times throughout the fight. His special ability teleports the player close to him and summons lightning at the arrival location of the teleport (giving the player a short time to move away in order to avoid considerably high damage). As with all other Legiones, his special ability's activation is signaled by an overhead chat message.


100% dropsEdit

Item Quantity Rarity GE price
Ascension shardAscension shard16–26Always3,440–5,590


No charmGold charmGreen charmCrimson charmBlue charm
Represents a 90% confidence range based on a sample of 866 kills.
6 charms are dropped at a time.
Add data to the log (requires JavaScript).

Main dropEdit

Item Quantity Rarity GE price
Coins 10000Coins37,000–40,000Common37,000–40,000
Coins 10000Coins57,000–60,000Uncommon57,000–60,000
Grimy snapdragonGrimy snapdragon10Common19,920
Grimy avantoeGrimy avantoe10Common15,410
Grimy dwarf weedGrimy dwarf weed5Common10,650
Grimy lantadymeGrimy lantadyme5Common14,310
Grimy torstolGrimy torstol5Uncommon18,690
Dwarf weed seed 5Dwarf weed seed2Common1,344
Lantadyme seed 5Lantadyme seed2Common1,270
Torstol seed 5Torstol seed1Uncommon1,165
Rune platebodyRune platebody(noted)Uncommon74,990
Dragon longswordDragon longsword1Uncommon57,203
Off-hand dragon longswordOff-hand dragon longsword1Uncommon56,445
Sirenic scaleSirenic scale1Uncommon[1]398,897
Rune barRune bar4Uncommon55,988
Magic shieldbow (u)Magic shieldbow (u)45–55Common23,715–28,985
Dragon arrowheads 5Dragon arrowheads30–60Common9,360–18,720
Rune arrowheads 5Rune arrowheads80–120Common18,880–28,320
Onyx bolt tips 5Onyx bolt tips1–11Uncommon6,757–74,327
Crystal triskelion fragment 1Crystal triskelion fragment 1[2]1Very rareNot sold
Crystal triskelion fragment 2Crystal triskelion fragment 2[2]1Very rareNot sold
Crystal triskelion fragment 3Crystal triskelion fragment 3[2]1Very rareNot sold

Tertiary dropsEdit

Item Quantity Rarity GE price
Ascension Keystone PrimusAscension Keystone Primus1Rare (1/384)[3]485,366
Ascension Keystone SecundusAscension Keystone Secundus1Rare (1/384)[3]327,630
Ascension Keystone TertiusAscension Keystone Tertius1Rare (1/384)[3]169,517
Ascension Keystone QuartusAscension Keystone Quartus1Rare (1/384)[3]194,057
Ascension Keystone QuintusAscension Keystone Quintus1Rare (1/384)[3]185,073
Ascension Keystone SextusAscension Keystone Sextus1Rare (1/384)[3]232,993
Ascension gripsAscension grips1Very rare (1/2,056)[3][4]2,147,772
Ascension signet IVAscension signet IV1Rare (1/50)[3]Not sold
Corrupted Ascension signet IVCorrupted Ascension signet IV1Very rare[5]Not sold
Order journal pageOrder journal page1UncommonNot sold
  1. ^ Previously confirmed to be 1/8 by Mod Lee, later updated.[1].
  2. ^ a b c Triskelion fragments are dropped in order.
  3. ^ a b c d e f g h Mod Timbo. "Revealing Drop Rates." 13 October 2017. Developers' Blogs.
  4. ^ Only while on a Slayer assignment.
  5. ^ Has a base drop rate of 1/1,000, with a threshold of 1,200.

Universal dropsEdit

Universal drops are dropped by nearly every monster outside of Daemonheim.
These drops are dropped alongside main drops.
Item Quantity Rarity GE price
Key tokenKey token1RareNot sold
Mimic kill tokenMimic kill token1Very rare42,921


  • I Got This (Runescore 40) - Defeat each of the six Legiones consecutively without leaving the Ascension dungeon.
  • Stand Your Ground (Runescore 50) - Defeat each of the six Legiones without moving.
  • We Are Legion (Runescore 0) - Obtained a collection of unique drops from Legiones.


  • Legio Quartus is roughly Latin for "Fourth Legion". However Legio is a feminine noun, while Quartus is a masculine adjective; the correct form would be Legio Quarta. Legions were the largest units of the Roman army and there were 6 in a whole army, hence there are six legiones in the Monastery.
  • Some time after the release the drop rate of the signet was increased from 1/64 to 1/50.